diff --git a/test/functional/feature_coinstatsindex.py b/test/functional/feature_coinstatsindex.py
index cf270b25eef..7488e3cb420 100755
--- a/test/functional/feature_coinstatsindex.py
+++ b/test/functional/feature_coinstatsindex.py
@@ -281,6 +281,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
         # Add another block, so we don't depend on reconsiderblock remembering which
         # blocks were touched by invalidateblock
         index_node.generate(1)
+        self.sync_all()
 
         # Ensure that removing and re-adding blocks yields consistent results
         block = index_node.getblockhash(99)